<html>
   <head>
      <script src="https://unpkg.com/three/build/three.min.js"></script>
      <script src="https://unpkg.com/@here/harp.gl/dist/harp.js"></script>
      <style>
         html, body {
            margin: 0; padding: 0; border: 0;
         }
         #map {
            height: 100vh; width: 100vw;
         }
      </style>
   </head>
   <body>
      <canvas id="map"></canvas>   
      <script src="index.js"></script>
   </body>
</html>